Distribution, redistribution, and geochronology of polychlorinated biphenyl congeners and other chlorinated hydrocarbons in Lake Ontario sediments

1989 ◽  
Vol 23 (2) ◽  
pp. 200-208 ◽  
Author(s):  
Barry G. Oliver ◽  
Murray N. Charlton ◽  
Raymond W. Durham
Keyword(s):  
Polychlorinated Biphenyl ◽  
Chlorinated Hydrocarbons ◽  
Lake Ontario

Accumulation, Inventory, and Diagenesis of Chlorinated Hydrocarbons in Lake Ontario Sediments

1995 ◽  
Vol 29 (10) ◽  
pp. 2661-2672 ◽  
Author(s):  
Charles S. Wong ◽  
Gordon. Sanders ◽  
Daniel R. Engstrom ◽  
David T. Long ◽  
Deborah L. Swackhamer ◽  
...  
Keyword(s):  
Chlorinated Hydrocarbons ◽  
Lake Ontario

Chlorinated Hydrocarbons in the Surface Microlayer and Subsurface Water of the Niagara River, 1985-86

1988 ◽  
Vol 23 (2) ◽  
pp. 292-300 ◽  
Author(s):  
R. James Maguire ◽  
Richard J. Tkacz
Keyword(s):  
Chlorinated Hydrocarbons ◽  
Lake Ontario ◽  
Subsurface Water ◽  
Surface Microlayer ◽  
Water Interface ◽  
Niagara River ◽  
Niagara Falls ◽  
Increased Risk ◽  
Air Water Interface ◽  
High Concentrations

Abstract The surface microlayer of the Niagara River at Niagara-on-the-Lake was sampled 34 times in 1985-86, and was shown to contain PCBs, chlorobenzenes and chlorinated hydrocarbons at concentrations generally up to 40 times greater than concentrations 1n subsurface water. Organisms which spend part or all of their lives at the air-water interface are thus likely to be at increased risk relative to subsurface water exposure. A small “spill” of PCBs 1n the river on July 29, 1986 was only detected in the surface micro-layer, and not in subsurface water. On this date, concentrations of PCBs in the surface microlayer were up to 6,400 times larger than concentrations in the subsurface water, and 1t appeared that the “spill” was downstream of Niagara Falls and the Whirlpool. Despite such high concentrations of chlorinated hydrocarbons in the surface microlayer, at no time during this study did the microlayer contribute significantly, relative to subsurface water, to the loading (i.e., amounts) of these chemicals from the Niagara River to Lake Ontario.

Enhanced Airborne Polychlorinated Biphenyl (PCB) Concentrations and Chlorination Downwind of Lake Ontario

2001 ◽  
Vol 35 (16) ◽  
pp. 3280-3286 ◽  
Author(s):  
Jeffrey Chiarenzelli ◽  
James Pagano ◽  
Ronald Scrudato ◽  
Lauren Falanga ◽  
Karen Migdal ◽  
...  
Keyword(s):  
Polychlorinated Biphenyl ◽  
Lake Ontario

Application of a food web bioaccumulation model for the prediction of polychlorinated biphenyl, dioxin, and furan congener concentrations in Lake Ontario aquatic biota

1999 ◽  
Vol 56 (8) ◽  
pp. 1389-1400 ◽  
Author(s):  
Heather A Morrison ◽  
D Michael Whittle ◽  
Chris D Metcalfe ◽  
Arthur J Niimi
Keyword(s):  
Food Web ◽  
Polychlorinated Biphenyl ◽  
Lake Ontario ◽  
Measured Data ◽  
Aquatic Biota ◽  
Metabolic Rates ◽  
Pcb Congeners ◽  
Model Predictions ◽  
Factor Log ◽  
Parameterized Model

A previously developed benthic/pelagic food web bioaccumulation model was parameterized to predict concentrations of nine nonmetabolized polychlorinated biphenyl (PCB) congeners in invertebrates and fish from Lake Ontario. Predicted concentrations were compared with field-measured concentrations to verify the predictability of the model. Overall, 86% of model predictions were within a factor of 2 and 100% of predictions were within a factor of 10 of field-measured concentrations. The parameterized model was used to estimate chemical metabolic rates for 15 PCB, polychlorinated dibenzo-p-dioxin (PCDD), and polychlorinated dibenzo-p-furan (PCDF) congeners that are potentially metabolized. Estimated chemical metabolic rates ranged from 7.5 × 10-3 to 1.0 × 10-7·day-1 and were in general agreement with qualitative studies describing rates of metabolism of these chemicals by aquatic biota. The calibrated model was used to predict concentrations of all 24 PCB, PCDD, and PCDF congeners in invertebrates and fish commonly found in Lake Ontario but for which no field-measured data exist. These concentrations were expressed as the logarithm of the bioaccumulation factor (log BAF). The log BAF's in benthic invertebrates and salmonids ranged from 4.2 to 10.2 and from 5.1 to 11.6, respectively, and were consistent with field-measured BAF's.

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